【选型】国产低功耗IO扩展芯片TPT29555解决MCU端口不足痛点，其I2C通信速度最高可达400kHz

【选型】扩展IO数达16个的IO扩展芯片NCA9555助力TBOX系统，I2C通信速度高达400KHz

某TBOX项目，由于终端用户对系统功能要求的增加，导致之前选的主控MCU，其IO口资源不够。为了不增加太多成本，以及节约开发时间，选用了纳芯微的16位I2C总线IO扩展芯片NCA9555，介绍了该IO扩展芯片的相关特性，供读者参考。

【选型】国产16位IO扩展芯片TPT29555-QF8R-S和TCA9539RGER参数对比，重要参数基本一致

在现今国际形势和芯片短缺状况下，全站仪等项目中原先采用国际一线大牌的芯片，为了预防采购问题导致的生产难题，需要准备二供。本文对16位IO扩展芯片TCA9539RGER和思瑞浦TPT29555-QF8R-S做一个参数对比，说明两者兼容，为设计者提供参考。

【选型】国产GPIO扩展芯片XL9555 PTP替换PCA9555APW，助力服务器主板控制总线设计

随着物联网等应用的持续发展，系统设计的复杂度不断增加，主设备和许多终端设备共存于同一系统中，增加了控制总线布局难度，往往需要GPIO接口扩展芯片来简化电路设计和提高信号完整性，最终降低系统总成本。某客户服务器主板中采用了NXP的接口芯片PCA9555APW作为外设的控制和状态监测，由于国产化要求，需求替代物料，本文重点推荐国产信路达的XL9555，下面从二者性能参数等方面对比分析替代可行性。

【应用】IO扩展芯片TPT29555应用于灯具，通过I²C总线相连设置模式实现多LED灯条的分别控制

某客户在设计灯具时，在原有的设计基础上增加灯条数量，导致原先主芯片的IO口数量不够，客户又不希望进行换主芯片的大改动，因此考虑增加一款16位GPIO扩展器，来实现更多灯条的分别控制。本文推荐思瑞浦推出的IO扩展芯片TPT29555。

思瑞浦-TI/ADI/美信全品类对照表

描述- 思瑞浦-TI/ADI/美信全品类对照表

型号- OPA4354AIDG4,TL071BCDR,TL074IDRE4,LPV801DBVR,SN65HVD06DG4,LMV331IDCKTE4,LPV801DBVT,TPA1295H-SO1R,DAC8775IRWFR,LM393DRE4,TRS3232ECDBR,TPK1032AAL1 - S6TR,DAC7568ICPWR,SN75176BPSRG4,DAC8775IRWFT,TLC2272ACPWR,TL082IPWR,THS7374IPWR,LMV358IPWRG4,MAX3232IDBG4,LP5907SNX-4.5/NOPB,OPA4171AIPW,OPA2348AIDGK,TLV8802DGKT,TL072CDG4,INA199C3DCKT,LM324KAPWR,INA214BIDCKT,INA199C3DCKR,OPA2348AIDG4,THS1030CPW,TLV8802DGKR,TLV316IDCKR,INA201AIDGKT,TLV316IDCKT,TLC2272CDG4,INA214BIDCKR,INA201AIDGKR,OPA4348AIDRG4,TPA1862-SR,LMV358QDGKR,RC4580IDG4,DAC8531E/2K5,DAC7554IDGSR,CD4051BMG4,TPL 710 F12 - 3 TR,LM2902DG4,TPS70618DBVR,CD4052BMT,TPS70618DBVT,TPL903212-WS1R,LMV331IDCKTG4,TPK1032AFL1 - S6TR,OPA2197IDGKT,LM2903QDG4,LP5907MFX-1.5/NOPB,OPA277AIDRMR,TP2011U-CR,TLV70030DDCT,LM393DRG3,OPA277AIDRMT,LM393DRG4,TLV70030DDCR,RC4580IPWG4,CD74HC4051PWTG4,AM26LS32AIDR,OPA2197IDGKR,LMV358IPWRE4,TPL730 F12 - FR,SN65HVD75DGK,OPA374AIDR,LMP7704MTX/NOPB,TPL710F12 - 5TR,TLC2272CPWG4,LM809M3X-3.08/NOPB,LM3880MF-1AB/NOPB,LM2903AVQDRG4,LM339AD,OPA2188AIDR,LM2903D,TP2112-SR,TP5591-TR/TP2311-TR,LMV321IDBVT,LMV321IDBVR,LM339D,INA210AIDCKT,SN65HVD3082EDGKR,INA210AIDCKR,DAC8565IDPWG4,DAC7513N,TPL903228-WS1R,TPA1862-VR,TPC114S1,TL072BCDRG4,SN65HVD06DR,OPA4171AID,LM2904D,TPL730 F28 - 5 TR,TPT9L484L1,DAC7513E,TPS70625DBVR,TP1961-CR,TPL730 F1 5 - CR,TLV522DGKR,CD74HC4052PWRG4,TPS70625DBVT,TP2124-SR,TLV522DGKT,LM324KPWR,SN74LVC1G3157DCKR,DAC8555IPWG4,TPL 720 F28 - 3 TR,TPL9032285-S5TR,TLC2272IPWRG4,DAC7512N,LM339ADRE4,ISO7721,DAC7512E,TCA9539,TPT3232E,LM324KAPWRG4,ISO7720,TPL903230-S5TR,TPL740F12 - FR,SN65HVD72DRBR,TPL730 F12 - CR,SN65HVD72DRBT,TL072BCDRE4,TP6001U-TR,TLV5636IDGK,LM324A-SR,OPA2354AIDGKTG4,MAX3232ECDBRG4,OPA322SAIDBVR,TLV8544DR,THS7314DG4,DAC8534IPWRG4,TLV8544DT,TP2582-SR,LPV358MM/NOPB,OPA322SAIDBVT,OPA2320AIDGKT,TLV803RDBZT,OPA2320AIDGKR,MAX3232IDBE4,TLV803RDBZR,TP181A3-CR,CD4052BPW,TLV3492AID,TPV6823L-TR,SN65HVD72DR,LOG114AIRGVT,LM339ADRG4,LOG114AIRGVR,LMV7219M5/NOPB,LM324APWRG4,TRS3232ECPWG4,DAC124S085CIMM,LM324KDR,TLV9004IRTER,RC4580IPWR,LM2902KPWRG4,TP10-SR,SN65MLVD206DR,TPS3823-25DBVR,TPS3823-25DBVT,LM358DGKR,OPA354AIDBVRG4,TLV73333PDBVR,TLV2452CDGKR,OPA4322SAIPWR,TLV73333PDBVT,PCA9306DCUTE4,LMV331IDBVRE4,CD74HC4051PWT,OPA2277UAG4,TLV70215DBVT,LM358PWG4,LP5910-1.2YKAR,CD74HC4051PWR,TLV70215DBVR,LMV358B-VR,DAC7564ICPWRG4,TPL903240-DF1R,TL072CPWR,OPA4354AIPWT,INA199C1DCKT,TL074BCD,LMV824MX/NOPB,OPA4354AIPWR,INA199C1DCKR,LMV358IDGKRG4,LM324APWE4,TL082IDG4,LM324APWRE4,LMP7701MA/NOPB,TP2112-VR,OPA348AIDBVRG4,TLV2454IDR,DAC8568IDPWR,CD4053BM96G4,TRS3232EIPW,OPA171AIDRLT,TLV9001IDCKR,OPA2335AIDGKTG4,OP07CD,LMV822MMX/NOPB,LMV771MGX/NOPB,TL074CDG4,SN74LVC1G3157DCK3,TLV9062IDR,TPH2504-TR,OPA171AIDRLR,TP2124-TR,TLC2274ACDRG4,TP1561AL1,PCA9306DCUTG4,TLV9001TIDCKR,LMV331IDBVRG4,LP5910-0.9YKAR,LM2903BIDR,LP5907MFX-4.5/NOPB,NSI8220NX,OPA2277UAE4,TPW3221-VR,TLC2272AIDRG4,SN65HVD3082EDG4,LM3880MFX-1AC/NOPB,CD4053BM96G3,LM358ADR,TP6001,LM324KAD,OP07DD,TPL730 F25 - 5 TR,LP5907MFX-2.9/NOPB,SN65MLVD204BDR,TPH2504-SR,TP6004,LM324APWG4,TP6002,DAC8411IDCKRG4,MAX3232ECDBE4,TP2411-CR,SN65HVD3082EDGK,TL081ID,LM809M3-2.93,INA282AIDR,THVD1410DGKR,LM224DRG4,CD4053BMG4,LM224DRG3,OPA2320SAIDRGR,OPA2320SAIDRGT,MAX3232ECDWG4,MAX3232EIDWR,DAC8550IDGKRG4,TL071CDRE4,TPV6823S-TR,LOG2112AIDWR,DAC8565IBPWG4,MAX3232CDWR,THS7374IPW,LMV824M/NOPB,DAC7568ICPW,OPA2348AIDR,TPW3157A-CR,TLV5610IPWG4,TL084IDE4,TPC116S4-TR,TP5532-VR,TLV5614CPWG4,DAC8718SRGZT,TLV75533PDBVR,DAC8718SRGZR,RC4558DGKRG4,LP5907SNX-2.2/NOPB,OPA2322AID,CD4051BM96,LMV772MMX/NOPB,LMV772MA/NOPB,TP1511-TR,OPA2197-Q1,TLC2272ID,AM26LS31CDR,TP10,TPS3823-50DBVR,TPL740 F1 5 - 5 TR,TPS3823-50DBVT,AM26LV31EIRGYR,LMV358B-SR,MAX3221IDB,TPL710F33 - 5TR,TLC2272MD,TP8485E-SR,LMV824MTX/NOPB,LM324KADRG4,TL071CDRG4,TP1981-CR,TL082CPWRG4,DRV8837CDSGT,DRV8837CDSGR,TP2312-VR,TLV73315PDBVT,LMP7701MF/NOPB,TLV73315PDBVR,TL074IDRG4,LM3880MFE-1AF/NOPB,DAC7714U/1K,OPA360AIDCKTG4,TL084IDG4,TPP20608,TP2121-CR,SN75HVD08DR,OPA2277UA/2K5,TLC2274CPW,TLV75530PDQNT,LM339DR,TLV75515PDBVR,DAC8565IBPWR,LM3881MM/NOPB,OPA2277UG4,TLV75530PDQNR,LM809M3X-4.63/NOPB,TLV73330PDQNR,THS7374IPWRG4,TLV73330PDQNT,TPL820F18 - 5TR,TL072CDE4,LP5907SNX-2.9/NOPB,TPM2003,LM3881MME/NOPB,RC4558IDR,DAC8531IDRBR,DAC8531IDRBT,LM2903DR,LM293D,TPA620-VR,CD74HC4053MT,TLV70233DBVR,TLV70330DBVR,TLV70233DBVT,TPS7A0533PDQNR,OPA335AIDBVRG4,TPS70630DBVT,TPS7A0533PDQNT,TPS70630DBVR,TL074ACDR,LMV7239M7,TL072ID,INA199A3DCKR,INA199A3DCKT,DAC8568IAPWR,DAC8564IBPW,TPL740F30 - FR,TP8485E-VR,TL072IDRE4,TPL720F33 - 5TR,LP5910-1.0YKAR,LM809M3X-4.38/NOPB,LM3880MFE-1AD/NOPB,TL081CD,TPW4051-TR,LM358LVIPWR,LMV321IDBVTE4,MAX3232EIPWRG4,TP1564AL1,TPV810L-3STR,TPT3122EHL1-QF8R,TLV2376IDR,LM358ADGKR,TP1282L1-FR,INA240A2DR,DAC8550IDGKR,DAC8560IBDGKTG4,DAC8550IDGKT,AM26LV32EIPWR,TPA6581-S5TR,LOG114AIRGVTG4,TRS3122ERGET,TP321-TR,OPA335AID,TRS3122ERGER,TPL903228-S5TR,OPA4197ID,TL082ACDRE4,TL081IDRG4,TL084ACDE4,OPA4322AIPWR,LM258DR,TLV9002IDSGT,TP1284L1-TR,TLV9002IDSGR,THS5651AIPWRG4,TL082BCD,TL072IDRG4,MAX32

【应用】国产智多晶FPGA助力自动化测试设备扩展上百GPIO口，解决MCU端口不足痛点，核电压为1.2V

在一款自动化测试设备上，需要控制5个步进电机、86个电磁铁和几十个指示灯，以及外部通讯接口，使用的雅特力的AT32F407RCT7，由于控制逻辑并不复杂，需要使用的IO会比较多，因此需要对MCU的IO口进行扩展。客户希望在扩展的控制芯片增加步进电机的驱动，只需要发送指令就可以控制电机的旋转。推荐了智多晶的FPGA SL2E-5E-8M121I。

【应用】思瑞浦I/O扩展芯片TPT29555-QF8R-S用于相机扩展板，工作电压1.65~5.5V，采用小封装节省空间

某客户是做各类板卡的，主要是面对人工智能领域的，像无人机、机器学习、自动驾驶系统等。其中一款相机扩展板项目比较紧急，由于要外接一些LED灯、外部按键以及其他调试接口，最终客户选用了思瑞浦的IO扩展芯片TPT29555-QF8R-S。

思瑞浦-TI对照表

描述- 思瑞浦与TI的型号对照，包含DCDC,接口产品,电源管理产品,线性管理产品,转换器,隔离产品,驱动器等产品。

型号- OPA4354AIDG4,TL071BCDR,TL074IDRE4,LPV801DBVR,SN65HVD06DG4,LMV331IDCKTE4,LPV801DBVT,TPA1295H-SO1R,DAC8775IRWFR,LM393DRE4,TRS3232ECDBR,TPK1032AAL1 - S6TR,DAC7568ICPWR,SN75176BPSRG4,DAC8775IRWFT,TLC2272ACPWR,TL082IPWR,THS7374IPWR,LMV358IPWRG4,MAX3232IDBG4,LP5907SNX-4.5/NOPB,OPA4171AIPW,OPA2348AIDGK,TLV8802DGKT,TL072CDG4,INA199C3DCKT,LM324KAPWR,INA214BIDCKT,INA199C3DCKR,OPA2348AIDG4,THS1030CPW,TLV8802DGKR,TLV316IDCKR,INA201AIDGKT,TLV316IDCKT,TLC2272CDG4,INA214BIDCKR,INA201AIDGKR,OPA4348AIDRG4,TPA1862-SR,LMV358QDGKR,RC4580IDG4,DAC8531E/2K5,DAC7554IDGSR,CD4051BMG4,TPL 710 F12 - 3 TR,LM2902DG4,TPS70618DBVR,CD4052BMT,TPS70618DBVT,TPL903212-WS1R,LMV331IDCKTG4,TPK1032AFL1 - S6TR,OPA2197IDGKT,LM2903QDG4,LP5907MFX-1.5/NOPB,OPA277AIDRMR,TP2011U-CR,TLV70030DDCT,LM393DRG3,OPA277AIDRMT,LM393DRG4,TLV70030DDCR,RC4580IPWG4,CD74HC4051PWTG4,AM26LS32AIDR,OPA2197IDGKR,LMV358IPWRE4,TPL730 F12 - FR,SN65HVD75DGK,OPA374AIDR,LMP7704MTX/NOPB,TPL710F12 - 5TR,TLC2272CPWG4,LM809M3X-3.08/NOPB,LM3880MF-1AB/NOPB,LM2903AVQDRG4,LM339AD,OPA2188AIDR,LM2903D,TP2112-SR,TP5591-TR/TP2311-TR,LMV321IDBVT,LMV321IDBVR,LM339D,INA210AIDCKT,SN65HVD3082EDGKR,INA210AIDCKR,DAC8565IDPWG4,DAC7513N,TPL903228-WS1R,TPA1862-VR,TPC114S1,TL072BCDRG4,SN65HVD06DR,OPA4171AID,LM2904D,TPL730 F28 - 5 TR,TPT9L484L1,DAC7513E,TPS70625DBVR,TP1961-CR,TPL730 F1 5 - CR,TLV522DGKR,CD74HC4052PWRG4,TPS70625DBVT,TP2124-SR,TLV522DGKT,LM324KPWR,SN74LVC1G3157DCKR,DAC8555IPWG4,TPL 720 F28 - 3 TR,TPL9032285-S5TR,TLC2272IPWRG4,DAC7512N,LM339ADRE4,ISO7721,DAC7512E,TPT3232E,LM324KAPWRG4,ISO7720,TPL903230-S5TR,TPL740F12 - FR,SN65HVD72DRBR,TPL730 F12 - CR,SN65HVD72DRBT,TL072BCDRE4,TP6001U-TR,TLV5636IDGK,LM324A-SR,OPA2354AIDGKTG4,MAX3232ECDBRG4,OPA322SAIDBVR,TLV8544DR,THS7314DG4,DAC8534IPWRG4,TLV8544DT,TP2582-SR,LPV358MM/NOPB,OPA322SAIDBVT,OPA2320AIDGKT,TLV803RDBZT,OPA2320AIDGKR,MAX3232IDBE4,TLV803RDBZR,TP181A3-CR,CD4052BPW,TLV3492AID,TPV6823L-TR,SN65HVD72DR,LOG114AIRGVT,LM339ADRG4,LOG114AIRGVR,LMV7219M5/NOPB,LM324APWRG4,TRS3232ECPWG4,DAC124S085CIMM,LM324KDR,TLV9004IRTER,RC4580IPWR,LM2902KPWRG4,TP10-SR,SN65MLVD206DR,TPS3823-25DBVR,TPS3823-25DBVT,LM358DGKR,OPA354AIDBVRG4,TLV73333PDBVR,TLV2452CDGKR,OPA4322SAIPWR,TLV73333PDBVT,PCA9306DCUTE4,LMV331IDBVRE4,CD74HC4051PWT,OPA2277UAG4,TLV70215DBVT,LM358PWG4,LP5910-1.2YKAR,CD74HC4051PWR,TLV70215DBVR,LMV358B-VR,DAC7564ICPWRG4,TPL903240-DF1R,TL072CPWR,OPA4354AIPWT,INA199C1DCKT,TL074BCD,LMV824MX/NOPB,OPA4354AIPWR,INA199C1DCKR,LMV358IDGKRG4,LM324APWE4,TL082IDG4,LM324APWRE4,LMP7701MA/NOPB,TP2112-VR,OPA348AIDBVRG4,TLV2454IDR,DAC8568IDPWR,CD4053BM96G4,TRS3232EIPW,OPA171AIDRLT,TLV9001IDCKR,OPA2335AIDGKTG4,OP07CD,LMV822MMX/NOPB,LMV771MGX/NOPB,TL074CDG4,SN74LVC1G3157DCK3,TLV9062IDR,TPH2504-TR,OPA171AIDRLR,TP2124-TR,TLC2274ACDRG4,TP1561AL1,PCA9306DCUTG4,TLV9001TIDCKR,LMV331IDBVRG4,LP5910-0.9YKAR,LM2903BIDR,LP5907MFX-4.5/NOPB,NSI8220NX,OPA2277UAE4,TPW3221-VR,TLC2272AIDRG4,SN65HVD3082EDG4,LM3880MFX-1AC/NOPB,CD4053BM96G3,LM358ADR,TP6001,LM324KAD,OP07DD,TPL730 F25 - 5 TR,LP5907MFX-2.9/NOPB,SN65MLVD204BDR,TPH2504-SR,TP6004,LM324APWG4,TP6002,DAC8411IDCKRG4,MAX3232ECDBE4,TP2411-CR,SN65HVD3082EDGK,TL081ID,LM809M3-2.93,INA282AIDR,THVD1410DGKR,LM224DRG4,CD4053BMG4,LM224DRG3,OPA2320SAIDRGR,OPA2320SAIDRGT,MAX3232ECDWG4,MAX3232EIDWR,DAC8550IDGKRG4,TL071CDRE4,TPV6823S-TR,LOG2112AIDWR,DAC8565IBPWG4,MAX3232CDWR,THS7374IPW,LMV824M/NOPB,DAC7568ICPW,OPA2348AIDR,TPW3157A-CR,TLV5610IPWG4,TL084IDE4,TPC116S4-TR,TP5532-VR,TLV5614CPWG4,DAC8718SRGZT,TLV75533PDBVR,DAC8718SRGZR,RC4558DGKRG4,LP5907SNX-2.2/NOPB,OPA2322AID,CD4051BM96,LMV772MMX/NOPB,LMV772MA/NOPB,TP1511-TR,OPA2197-Q1,TLC2272ID,AM26LS31CDR,TP10,TPS3823-50DBVR,TPL740 F1 5 - 5 TR,TPS3823-50DBVT,AM26LV31EIRGYR,LMV358B-SR,MAX3221IDB,TPL710F33 - 5TR,TLC2272MD,TP8485E-SR,LMV824MTX/NOPB,LM324KADRG4,TL071CDRG4,TP1981-CR,TL082CPWRG4,DRV8837CDSGT,DRV8837CDSGR,TP2312-VR,TLV73315PDBVT,LMP7701MF/NOPB,TLV73315PDBVR,TL074IDRG4,LM3880MFE-1AF/NOPB,DAC7714U/1K,OPA360AIDCKTG4,TL084IDG4,TPP20608,TP2121-CR,SN75HVD08DR,OPA2277UA/2K5,TLC2274CPW,TLV75530PDQNT,LM339DR,TLV75515PDBVR,DAC8565IBPWR,LM3881MM/NOPB,OPA2277UG4,TLV75530PDQNR,LM809M3X-4.63/NOPB,TLV73330PDQNR,THS7374IPWRG4,TLV73330PDQNT,TPL820F18 - 5TR,TL072CDE4,LP5907SNX-2.9/NOPB,TPM2003,LM3881MME/NOPB,RC4558IDR,DAC8531IDRBR,DAC8531IDRBT,LM2903DR,LM293D,TPA620-VR,CD74HC4053MT,TLV70233DBVR,TLV70330DBVR,TLV70233DBVT,TPS7A0533PDQNR,OPA335AIDBVRG4,TPS70630DBVT,TPS7A0533PDQNT,TPS70630DBVR,TL074ACDR,LMV7239M7,TL072ID,INA199A3DCKR,INA199A3DCKT,DAC8568IAPWR,DAC8564IBPW,TPL740F30 - FR,TP8485E-VR,TL072IDRE4,TPL720F33 - 5TR,LP5910-1.0YKAR,LM809M3X-4.38/NOPB,LM3880MFE-1AD/NOPB,TL081CD,TPW4051-TR,LM358LVIPWR,LMV321IDBVTE4,MAX3232EIPWRG4,TP1564AL1,TPV810L-3STR,TPT3122EHL1-QF8R,TLV2376IDR,LM358ADGKR,TP1282L1-FR,INA240A2DR,DAC8550IDGKR,DAC8560IBDGKTG4,DAC8550IDGKT,AM26LV32EIPWR,TPA6581-S5TR,LOG114AIRGVTG4,TRS3122ERGET,TP321-TR,OPA335AID,TRS3122ERGER,TPL903228-S5TR,OPA4197ID,TL082ACDRE4,TL081IDRG4,TL084ACDE4,OPA4322AIPWR,LM258DR,TLV9002IDSGT,TP1284L1-TR,TLV9002IDSGR,THS5651AIPWRG4,TL082BCD,TL072IDRG4,MAX3221IDBE4,

【应用】I²C转16路GPIO拓展器TPT29555-QF8R用于自动化显微镜调焦，可提升系统整体的拓展性

本文针对自动化显微镜对焦系统中拓展接口的选择，推荐了思瑞浦I²C转16路GPIO拓展器TPT29555-QF8R：16路的GPIO拓展接口，可以极大程度提升系统整体的拓展性；1.65V~5.5V的工作电源电压，使得能使用大部分主控和常见的LDO直接供电。 2、极低的待机电流使得整体能量消耗很低 3、16路的GPIO拓展接口，可以极大成都提升系统整体的拓展性